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Full Discussion: awk: switching lines and concatenating lines?
Top Forums Shell Programming and Scripting awk: switching lines and concatenating lines? Post 302408170 by alister on Sunday 28th of March 2010 02:03:33 PM
Old 03-28-2010
Hello, Borghal:

Welcome to the forums. I modified your sample data to include a pause-continue pair that reuses a key used by a previous pause-continue pair.

Code:
$ cat data
fiRcQ 9( [various data ])
klsRo 9( [various data ]) pause
fiRcQ 9( [various data ]) pause
klsRo continue 1
aPLnJ 62( [various data ])
fiRcQ continue 5
klsRo 9( [various data ]) pause
klsRo continue 21

$ awk 'NR==FNR {if ($2=="continue") c[$1,++c[$1,"i"]]=$0; next} $NF=="pause" {print $0,c[$1,++p[$1]]; next} $2!="continue"' data data
fiRcQ 9( [various data ])
klsRo 9( [various data ]) pause klsRo continue 1
fiRcQ 9( [various data ]) pause fiRcQ continue 5
aPLnJ 62( [various data ])
klsRo 9( [various data ]) pause klsRo continue 21

Regards,
Alister

---------- Post updated at 02:03 PM ---------- Previous update was at 01:56 PM ----------

If you need to strictly preserve the order, I would recommend my solution over Franklin52's. If not, then most definitely use Franklin52's as it's simpler and could be significantly faster (since mine must read the data twice).

Alister
Last edited by alister; 03-28-2010 at 03:09 PM..
 

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LEARN ABOUT HPUX

pause

pause(2)							System Calls Manual							  pause(2)

NAME

       pause - suspend process until signal

SYNOPSIS

DESCRIPTION

       suspends  the  calling  process	until  it  receives  a	signal.  The signal must be one that is not currently set to be ignored or blocked
       (masked) by the calling process.

       If the signal causes termination of the calling process, does not return.

       If the signal is by the calling process and control is returned from the signal-catching function  (see	signal(5)),  the  calling  process
       resumes execution from the point of suspension; with a return value of -1 from and set to

APPLICATION USAGE

   Threads Considerations
       Signal dispositions (such as catch/default/ignore) are shared by all threads in the process and blocked signal masks are maintained by each
       thread.	Therefore, the signals being waited for should not be ignored by the process or blocked by the calling thread.

       will suspend only the calling thread until it receives a signal.

       If other threads in the process do not block the signal, the signal may be delivered to another thread in the process and the thread in may
       continue waiting.  For this reason, the use of is recommended instead of for multi-threaded applications.

       For more information regarding signals and threads, refer to signal(5).

SEE ALSO

       alarm(2), kill(2), sigwait(2), wait(2), signal(5).

STANDARDS CONFORMANCE

																	  pause(2)
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